Speed run at park

Found a nice long fairly smooth road 2miles away at a park. Last run was 41 mph with 28/86 gearing, 4s 5000ma LIPO and castle 2400 kv on a short street. This time I had same everything but used a traxxas 3s 6400 LIPO and plenty of blacktop. Oh this is with my 2x4 pede. 51 mph this time. Now it's time to try that huge 4s LIPO again!

Thanks for the info, but I can't change the spur due to proline transmission. Not sure if proline came out with anything other than 86 yet. Wishing I wouldn't have bought that trans. Looking hard at the REM trans.